a market-town of England, in the county of Chester, on the left bank of the Weaver, near its confluence with the Dane, 15 miles N.E. of Chester, and 155 N.W. of London. It has an old-fashioned appearance, and contains many ancient buildings. The church, which is large, is remarkable for its semicircular chancel and curiously carved roof. There are also places of worship for Independents, Baptists, Wesleyan and Primitive Methodists, and several schools. Northwich is chiefly important for its salt mines and brine springs, the former of which have been worked since the seventeenth century, and are believed to be the richest salt mines in the world. The brine springs, however, are now more extensively used, and are calculated to yield from 300,000 to 400,000 tons of salt annually. This forms the principal article of trade in Northwich, being conveyed to Liverpool by the Weaver and Mersey, on which about 300 vessels are employed in this business. Ship-building, brick-making, iron and brass founding, brewing, and other avocations, are carried on here; and fairs are held three times a year. Pop. (1851) 1377.